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iPhone 6s, iOS 11
That means the phone is carrier locked to a cellular provider other than the one you are trying to use.
ONLY the carrier it is locked to can unlock it.
Contact them.
That means the phone is carrier locked to a cellular provider other than the one you are trying to use.
ONLY the carrier it is locked to can unlock it.
Contact them.
That usually means that the phone is locked to a carrier which is not the same as the Sim installed.
Contact your carrier.
Did you follow the instructions in the related article link at the top of the page? Did you contact your carrier for help with this?
I followed the given instructions. And still, it's not working.
Okay, thank you. But can I ask how do I can contact them?
What do you mean how do you contact them? You call them, or check their web site...
If you don't know what carrier it's locked to, ask whoever you got the phone from.
My sim is "invalid" and I tried the said solution. What am I gonna do?
